diff options
Diffstat (limited to 'fs/9p/vfs_inode_dotl.c')
-rw-r--r-- | fs/9p/vfs_inode_dotl.c | 170 |
1 files changed, 91 insertions, 79 deletions
diff --git a/fs/9p/vfs_inode_dotl.c b/fs/9p/vfs_inode_dotl.c index e3dd2a1e2bfc..53687bbf2296 100644 --- a/fs/9p/vfs_inode_dotl.c +++ b/fs/9p/vfs_inode_dotl.c @@ -57,7 +57,7 @@ v9fs_vfs_mknod_dotl(struct inode *dir, struct dentry *dentry, umode_t omode, * group of the new file system object. */ -static gid_t v9fs_get_fsgid_for_create(struct inode *dir_inode) +static kgid_t v9fs_get_fsgid_for_create(struct inode *dir_inode) { BUG_ON(dir_inode == NULL); @@ -186,7 +186,6 @@ static int v9fs_mapped_dotl_flags(int flags) { O_CREAT, P9_DOTL_CREATE }, { O_EXCL, P9_DOTL_EXCL }, { O_NOCTTY, P9_DOTL_NOCTTY }, - { O_TRUNC, P9_DOTL_TRUNC }, { O_APPEND, P9_DOTL_APPEND }, { O_NONBLOCK, P9_DOTL_NONBLOCK }, { O_DSYNC, P9_DOTL_DSYNC }, @@ -230,20 +229,25 @@ int v9fs_open_to_dotl_flags(int flags) * @dir: directory inode that is being created * @dentry: dentry that is being deleted * @mode: create permissions - * @nd: path information * */ static int v9fs_vfs_create_dotl(struct inode *dir, struct dentry *dentry, umode_t omode, - struct nameidata *nd) + bool excl) +{ + return v9fs_vfs_mknod_dotl(dir, dentry, omode, 0); +} + +static int +v9fs_vfs_atomic_open_dotl(struct inode *dir, struct dentry *dentry, + struct file *file, unsigned flags, umode_t omode, + int *opened) { int err = 0; - gid_t gid; - int flags; + kgid_t gid; umode_t mode; char *name = NULL; - struct file *filp; struct p9_qid qid; struct inode *inode; struct p9_fid *fid = NULL; @@ -251,19 +255,29 @@ v9fs_vfs_create_dotl(struct inode *dir, struct dentry *dentry, umode_t omode, struct p9_fid *dfid, *ofid, *inode_fid; struct v9fs_session_info *v9ses; struct posix_acl *pacl = NULL, *dacl = NULL; + struct dentry *res = NULL; - v9ses = v9fs_inode2v9ses(dir); - if (nd) - flags = nd->intent.open.flags; - else { - /* - * create call without LOOKUP_OPEN is due - * to mknod of regular files. So use mknod - * operation. - */ - return v9fs_vfs_mknod_dotl(dir, dentry, omode, 0); + if (d_unhashed(dentry)) { + res = v9fs_vfs_lookup(dir, dentry, 0); + if (IS_ERR(res)) + return PTR_ERR(res); + + if (res) + dentry = res; } + /* Only creates */ + if (!(flags & O_CREAT)) + return finish_no_open(file, res); + else if (dentry->d_inode) { + if ((flags & (O_CREAT | O_EXCL)) == (O_CREAT | O_EXCL)) + return -EEXIST; + else + return finish_no_open(file, res); + } + + v9ses = v9fs_inode2v9ses(dir); + name = (char *) dentry->d_name.name; p9_debug(P9_DEBUG_VFS, "name:%s flags:0x%x mode:0x%hx\n", name, flags, omode); @@ -272,7 +286,7 @@ v9fs_vfs_create_dotl(struct inode *dir, struct dentry *dentry, umode_t omode, if (IS_ERR(dfid)) { err = PTR_ERR(dfid); p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err); - return err; + goto out; } /* clone a fid to use for creation */ @@ -280,7 +294,7 @@ v9fs_vfs_create_dotl(struct inode *dir, struct dentry *dentry, umode_t omode, if (IS_ERR(ofid)) { err = PTR_ERR(ofid); p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); - return err; + goto out; } gid = v9fs_get_fsgid_for_create(dir); @@ -316,13 +330,11 @@ v9fs_vfs_create_dotl(struct inode *dir, struct dentry *dentry, umode_t omode, p9_debug(P9_DEBUG_VFS, "inode creation failed %d\n", err); goto error; } - err = v9fs_fid_add(dentry, fid); - if (err < 0) - goto error; - d_instantiate(dentry, inode); - /* Now set the ACL based on the default value */ - v9fs_set_create_acl(dentry, &dacl, &pacl); + v9fs_set_create_acl(inode, fid, dacl, pacl); + + v9fs_fid_add(dentry, fid); + d_instantiate(dentry, inode); v9inode = V9FS_I(inode); mutex_lock(&v9inode->v_mutex); @@ -345,17 +357,19 @@ v9fs_vfs_create_dotl(struct inode *dir, struct dentry *dentry, umode_t omode, } mutex_unlock(&v9inode->v_mutex); /* Since we are opening a file, assign the open fid to the file */ - filp = lookup_instantiate_filp(nd, dentry, generic_file_open); - if (IS_ERR(filp)) { - err = PTR_ERR(filp); + err = finish_open(file, dentry, generic_file_open, opened); + if (err) goto err_clunk_old_fid; - } - filp->private_data = ofid; + file->private_data = ofid; #ifdef CONFIG_9P_FSCACHE if (v9ses->cache) - v9fs_cache_inode_set_cookie(inode, filp); + v9fs_cache_inode_set_cookie(inode, file); #endif - return 0; + *opened |= FILE_CREATED; +out: + v9fs_put_acl(dacl, pacl); + dput(res); + return err; error: if (fid) @@ -363,8 +377,7 @@ error: err_clunk_old_fid: if (ofid) p9_client_clunk(ofid); - v9fs_set_create_acl(NULL, &dacl, &pacl); - return err; + goto out; } /** @@ -381,7 +394,7 @@ static int v9fs_vfs_mkdir_dotl(struct inode *dir, int err; struct v9fs_session_info *v9ses; struct p9_fid *fid = NULL, *dfid = NULL; - gid_t gid; + kgid_t gid; char *name; umode_t mode; struct inode *inode; @@ -420,17 +433,17 @@ static int v9fs_vfs_mkdir_dotl(struct inode *dir, if (err < 0) goto error; + fid = p9_client_walk(dfid, 1, &name, 1); + if (IS_ERR(fid)) { + err = PTR_ERR(fid); + p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", + err); + fid = NULL; + goto error; + } + /* instantiate inode and assign the unopened fid to the dentry */ if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { - fid = p9_client_walk(dfid, 1, &name, 1); - if (IS_ERR(fid)) { - err = PTR_ERR(fid); - p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", - err); - fid = NULL; - goto error; - } - inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb); if (IS_ERR(inode)) { err = PTR_ERR(inode); @@ -438,11 +451,11 @@ static int v9fs_vfs_mkdir_dotl(struct inode *dir, err); goto error; } - err = v9fs_fid_add(dentry, fid); - if (err < 0) - goto error; + v9fs_fid_add(dentry, fid); + v9fs_set_create_acl(inode, fid, dacl, pacl); d_instantiate(dentry, inode); fid = NULL; + err = 0; } else { /* * Not in cached mode. No need to populate @@ -454,16 +467,15 @@ static int v9fs_vfs_mkdir_dotl(struct inode *dir, err = PTR_ERR(inode); goto error; } + v9fs_set_create_acl(inode, fid, dacl, pacl); d_instantiate(dentry, inode); } - /* Now set the ACL based on the default value */ - v9fs_set_create_acl(dentry, &dacl, &pacl); inc_nlink(dir); v9fs_invalidate_inode_attr(dir); error: if (fid) p9_client_clunk(fid); - v9fs_set_create_acl(NULL, &dacl, &pacl); + v9fs_put_acl(dacl, pacl); return err; } @@ -557,10 +569,11 @@ int v9fs_vfs_setattr_dotl(struct dentry *dentry, struct iattr *iattr) struct v9fs_session_info *v9ses; struct p9_fid *fid; struct p9_iattr_dotl p9attr; + struct inode *inode = dentry->d_inode; p9_debug(P9_DEBUG_VFS, "\n"); - retval = inode_change_ok(dentry->d_inode, iattr); + retval = inode_change_ok(inode, iattr); if (retval) return retval; @@ -581,23 +594,23 @@ int v9fs_vfs_setattr_dotl(struct dentry *dentry, struct iattr *iattr) return PTR_ERR(fid); /* Write all dirty data */ - if (S_ISREG(dentry->d_inode->i_mode)) - filemap_write_and_wait(dentry->d_inode->i_mapping); + if (S_ISREG(inode->i_mode)) + filemap_write_and_wait(inode->i_mapping); retval = p9_client_setattr(fid, &p9attr); if (retval < 0) return retval; if ((iattr->ia_valid & ATTR_SIZE) && - iattr->ia_size != i_size_read(dentry->d_inode)) - truncate_setsize(dentry->d_inode, iattr->ia_size); + iattr->ia_size != i_size_read(inode)) + truncate_setsize(inode, iattr->ia_size); - v9fs_invalidate_inode_attr(dentry->d_inode); - setattr_copy(dentry->d_inode, iattr); - mark_inode_dirty(dentry->d_inode); + v9fs_invalidate_inode_attr(inode); + setattr_copy(inode, iattr); + mark_inode_dirty(inode); if (iattr->ia_valid & ATTR_MODE) { /* We also want to update ACL when we update mode bits */ - retval = v9fs_acl_chmod(dentry); + retval = v9fs_acl_chmod(inode, fid); if (retval < 0) return retval; } @@ -682,7 +695,7 @@ v9fs_vfs_symlink_dotl(struct inode *dir, struct dentry *dentry, const char *symname) { int err; - gid_t gid; + kgid_t gid; char *name; struct p9_qid qid; struct inode *inode; @@ -731,11 +744,10 @@ v9fs_vfs_symlink_dotl(struct inode *dir, struct dentry *dentry, err); goto error; } - err = v9fs_fid_add(dentry, fid); - if (err < 0) - goto error; + v9fs_fid_add(dentry, fid); d_instantiate(dentry, inode); fid = NULL; + err = 0; } else { /* Not in cached mode. No need to populate inode with stat */ inode = v9fs_get_inode(dir->i_sb, S_IFLNK, 0); @@ -822,7 +834,7 @@ v9fs_vfs_mknod_dotl(struct inode *dir, struct dentry *dentry, umode_t omode, dev_t rdev) { int err; - gid_t gid; + kgid_t gid; char *name; umode_t mode; struct v9fs_session_info *v9ses; @@ -865,17 +877,17 @@ v9fs_vfs_mknod_dotl(struct inode *dir, struct dentry *dentry, umode_t omode, goto error; v9fs_invalidate_inode_attr(dir); + fid = p9_client_walk(dfid, 1, &name, 1); + if (IS_ERR(fid)) { + err = PTR_ERR(fid); + p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", + err); + fid = NULL; + goto error; + } + /* instantiate inode and assign the unopened fid to the dentry */ if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { - fid = p9_client_walk(dfid, 1, &name, 1); - if (IS_ERR(fid)) { - err = PTR_ERR(fid); - p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", - err); - fid = NULL; - goto error; - } - inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb); if (IS_ERR(inode)) { err = PTR_ERR(inode); @@ -883,11 +895,11 @@ v9fs_vfs_mknod_dotl(struct inode *dir, struct dentry *dentry, umode_t omode, err); goto error; } - err = v9fs_fid_add(dentry, fid); - if (err < 0) - goto error; + v9fs_set_create_acl(inode, fid, dacl, pacl); + v9fs_fid_add(dentry, fid); d_instantiate(dentry, inode); fid = NULL; + err = 0; } else { /* * Not in cached mode. No need to populate inode with stat. @@ -898,14 +910,13 @@ v9fs_vfs_mknod_dotl(struct inode *dir, struct dentry *dentry, umode_t omode, err = PTR_ERR(inode); goto error; } + v9fs_set_create_acl(inode, fid, dacl, pacl); d_instantiate(dentry, inode); } - /* Now set the ACL based on the default value */ - v9fs_set_create_acl(dentry, &dacl, &pacl); error: if (fid) p9_client_clunk(fid); - v9fs_set_create_acl(NULL, &dacl, &pacl); + v9fs_put_acl(dacl, pacl); return err; } @@ -982,6 +993,7 @@ out: const struct inode_operations v9fs_dir_inode_operations_dotl = { .create = v9fs_vfs_create_dotl, + .atomic_open = v9fs_vfs_atomic_open_dotl, .lookup = v9fs_vfs_lookup, .link = v9fs_vfs_link_dotl, .symlink = v9fs_vfs_symlink_dotl, |